Connection string for sql server compact edition

The default value for this option is False. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. NET Framework 4. If you omit this setting, ADO. If the full path is longer than characters, a default database name is constructed from the path by appending a hash of the full path to the file name.

In LocalDB connection strings, the Visual Studio web project templates add a unique number as a suffix to both the file name and the Initial Catalog setting, as shown in the following example:.

Suppose the project specified the following values:. When you create a project with these settings and run it, LocalDB attaches the aspnet. The operation fails because that name is already attached to the first project's aspnet.

For the same reason, the suffixes added by the Visual Studio templates won't prevent name collisions if you create a copy of a project by copying the files instead of by creating a new project in Visual Studio, which generates a new unique number. If you want to create a new project by copying an existing project's files, change the suffix number manually to make it unique. With this connection string, what happens to the database name in the SQL Server instance is complicated.

If the database is created by the ASP. NET membership system or by Entity Framework Code First, a database name is created by taking the file name without the. If your own code creates the database, or if you detach the database and run the project again after the. If that name would be longer than characters, the database name would be the file name with a hash of the full path appended to it.

Some examples of these database names are shown in the following illustration:. This setting specifies whether the connection should use the user ID and password in the connection string to log on to the SQL Server instance, or the current Windows account credentials should be used for authentication:.

False means use SQL Server security to log in by using the User ID and Password values in the connection string, and raise an exception if they are not present. This is a common scenario when you use the Entity Framework, especially if you leave lazy loading enabled. For example, the second line of code in the following example will raise an exception if you don't enable MARS because the query that returns instructors is still active when the ToList method executes a new query that retrieves related courses:.

This can not be combined with mirroring, e. Use a read workload when connecting. Enforces read only at connection time, and also for USE database statements. The result of using ApplicationIntent depends on database configuration. See read-only routing. The default for ApplicationIntent is ReadWrite. You can either use an availability group listener for Server OR the read-only instance name to enforce a specific read-only instance.

If you connect to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. This one is working only on Windows, not on macOS or Linux. See the respective ODBC driver's connection strings options. This one is available in. NET Core as opposed to System.

Note that this will only work on a CE device. Read Only Access. Specification of Maximum Temp file Size. Specification of location of SDF File. GetDirectoryName System. Specification of Maximum Database Size. Specification of Maximum Buffer Size. NET Framework data provider is used for connecting to a database, executing commands, and retrieving results.

Those results are either processed directly, placed in a Dataset in order to be exposed to the user as needed, combined with data from multiple sources, or remoted between tiers.